313011220997 has 2 divisors, whose sum is σ = 313011220998. Its totient is φ = 313011220996.

The previous prime is 313011220993. The next prime is 313011221021. The reversal of 313011220997 is 799022110313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312688982596 + 322238401 = 559186^2 + 17951^2 .

It is a cyclic number.

It is not a de Polignac number, because 313011220997 - 2² = 313011220993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313011220997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313011220993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156505610498 + 156505610499.

It is an arithmetic number, because the mean of its divisors is an integer number (156505610499).

Almost surely, 2^313011220997 is an apocalyptic number.

It is an amenable number.

313011220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

313011220997 is an equidigital number, since it uses as much as digits as its factorization.

313011220997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The spelling of 313011220997 in words is "three hundred thirteen billion, eleven million, two hundred twenty thousand, nine hundred ninety-seven".